Filter cartridge



FIG. 1 is a perspective view for a filter cartridge showing our new design;

FIG. 2 is a front view thereof with the rear view being a mirror image thereof with respect to the claimed region;

FIG. 3 is a right side view thereof with the left side view being a mirror image thereof with respect to the claimed region;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken line showing of the remainder of the filter cartridge is for environmental purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a filter cartridge, as shown and described. 